Chain saw bar straightener



FIG. 1 is a top left front perspective view of a chain saw bar straightener showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a right side elevational view, the left being a mirror image thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a chain saw bar straightener, as shown and described. 